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Publisher: The Royal Society
Languages: English
Types: Article
Subjects:

Classified by OpenAIRE into

arxiv: Physics::Atmospheric and Oceanic Physics
Short lead-time forecasts using the operational United Kingdom Variable-Resolution ('UKV) configuration of the Met Office’s Numerical Weather Prediction model, with horizontal grid-length 1.5 km over the UK, with and without a representation of the 20 March 2015 eclipse, has been used to simulate the impact of the eclipse on UK weather. The major impact was surface-driven through changes to surface heat and moisture fluxes which changed\ud the boundary-layer development. In cloud-free areas, the nocturnal stable boundary-layer persisted or quickly re-established during the eclipse. Surface temperatures were reduced by 7-8 °C, near-surface air temperature by 1-3 °C, near-surface winds were backed, typically by 20 °. Impacts on wind speed were small and variable and would have been very difficult to detect. Smaller impacts occurred beneath cloud. However, the impact was enhanced because most of incoming radiation which reached the surface was driving surface sensible heat flux rather than moisture flux, and the near surface air temperature impact (0.5-1 °C) agrees reasonably well with observations. The modelled impact of the eclipse was substantially reduced in urban areas due to their large thermal inertia. Experience from other assessments of the model suggests that this lack of response may be exaggerated. Surface impacts propagated upwards and down stream with time, resulting in a complex pattern of response, though generally near-surface temperature differences persisted for many hours after the eclipse. The impact on atmospheric pressure fields was insufficient to account for any significant perturbations to the wind field when compared with the direct impacts of surface stress and boundary-layer mixing.\ud
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    • 1 Clayton H. H., 1901, The eclipse cyclone and the diurnal cyclones. Ann. Astron. Observ. Harvard College, 43: 5-22.
    • 2 Aplin K. L., Harrison R. G. 2003 Meteorological effects of the eclipse of 11 August 1999 in cloudy and clear conditions. Proc. R. Soc. Lond. A 459: 353-371. doi:10.1098/rspa.2002.1042
    • 3 Gross P., Hense A., 1999, Effects of a total solar eclipse on the mesoscale atmospheric circulation over Europe - a model experiment. Meteorol. Atmos. Phys., 71: 229-242. doi:10.1007/s007030050057
    • 4 Anderson R. C., Keefer D. R., 1975, Observation of the temperature and pressure changes during the 30 June 1973 solar eclipse. J. Atmos. Sci. 32: 228-231. doi:10.1175/1520- 0469(1975)032<0228:OOTTAP>2.0.CO;2
    • 5 Hanna E., 2000, Meteorological effects of the solar eclipse of 11 August 1999. Weather 55: 430- 446
    • 6 Gray, S. L. and Harrison, R. G., 2012, Diagnosing eclipse-induced wind changes. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 468: (2143). 1839-1850. ISSN 1364-5021 doi: 10.1098/rspa.2012.0007
    • 7 Prenosil T. 2000 The influence of the 11 August 1999 total solar eclipse on the weather over central Europe. Meteorol. Z. 9: 351-359.
    • 8 Clark, P.A., Roberts, N.M., Lean, H.W., Ballard, S.P. and Charlton-Perez, C., 2015, Convectionpermitting models: a step-change in rainfall forecasting, Meteorol. Appl. (In press)
    • 9 Cullen, M.J.P., Davies, T., Mawson, M.H., James, J.A., Coulter, S.C. and Malcolm A., 1997 An overview of Numerical Methods for the Next Generation UK NWP and Climate Model Numerical Methods in Atmospheric and Ocean Modelling. In The Andre J.Robert memorial volume. Edited by Charles A Lin, Rene Laprise and Harold Ritchie, Canadian Meteorological and Oceanographic Society, Ottawa, Canada, 425-444
    • 10 Davies, T.; Cullen, M.J.P.; Malcolm, A.J.; Mawson, M.H.; Staniforth, A.; White, A.A.; Wood, N., 2005, A new dynamical core for the Met Office's global and regional modelling of the atmosphere, Q. J. R. Meteorol. Soc., 131: 1759-1782
    • 11 Essery, R. , Best, M. an Cox, P. 2001, MOSES 2.2 Technical Documentation, Hadley Centre Technical Report No. 30, Met Office Hadley Centre
    • 12 Lock, A.P., Brown, A.R., Bush, M.R., Martin, G.M. and Smith, R.N.B. 2000, A New Boundary Layer Mixing Scheme. Part 1: Scheme Description and Single-Column Model Tests. Mon. Wea. Rev., 128: 3187-3199.
    • 13 Gregory, D. and Rowntree, P.R. 1990 A Mass Flux Convection Scheme with Representation of Cloud Ensemble Characteristics and Stability-Dependent Closure. Mon. Wea. Rev., 118: 1483- 1506.
    • 14 Wilson, D. R. and Ballard, S. P., 1999. A microphysically based precipitation scheme for the UK Meteorological Office Unified Model., Q. J. R. Meteorol. Soc., 125: 1607-1636.
    • 15 Rawlins FR, Ballard SP, Bovis KR, Clayton AM, Li D, Inverarity GW, Lorenc AC, Payne TJ. 2007. The Met Office global 4-Dimensional data assimilation system. Q. J. R. Meteorol. Soc., 133: 347-362.
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